Improvement in mill-picks



W. B. MORRIS.

Mill-Pick.

No. 198,996. Patented Jan'. 8,1878.

niventor wif/mf Y ltneSSeS UNITED: S'11er-Fsfs PATENT OFFIOF.

WILLIAM B. MORRIs, OFcOLLINsvILLE, CALIFORNIA.

IMPROVEMENT INMILL-PIOKS.

Specification forming part of Letters Patent No. 198,996, dated January8, 1878,' application-led l November 6, 1877.

To all 'whom it may concern:

Beit known that I, WILLIAM B. MoRRIs, of Collinsville, in the county ofSolano and State of California, have invented al1 Improved Mill-Pick;and I do hereby declare the following description and accompanyingdrawings are sucient to enable any person skilled in the art or scienceto which itmost nearly appertains to make and use my said inventionwithout further invention or experi; ment.

The object of my invention is to provide a mill-pick in which a long anda short bit can be used, and one also in which the pick'handle can beadjusted to dilferent angles to suit the convenience of the person usingit. `To provide, these features necessitates a novel construction of thepick-head, all as hereinafter described, reference being had to theaccompanying drawings, in which- Figure l is a perspective view, andFig. 2 a longitudinal section.

L'et A represent the head of my pick, and B the handle. The head Iconstruct in several part-s, Vof which D and E are two parallel plates,which bear against the sides of the chisels, and F is one of the sidesof the head, which sides I secure to the longitudinal edges of the outerplate.

A band or strap, G, incloses three sides of the head at its middle, asshown, and its ends I connect by a roller, H, acrossl lthe fourth side.The strap and roller thus connected hpld the two plates D and E togetherand in p ace.

The outer plate D,I form with shoulders or raised portions I at eitherend, and a strip of metal, J, somewhat longer than the distance betweenthe shoulders I. I bend it so as to bring its ends against theseshoulders I, while it will curve outward from the ends, its centeralmost touching the outer side of the strap G. vI place a set-screw, K,in the outer side of the strap G, so that it can be turned and press thestrip J against the outer plate D. This outer plate, with the sides F,slides in the strap G, and the sides F, I cut away to allow of thismovement. The openin g thusl cut forms a guide, in which the sides andplate move. The inner plate E also slides within the strap G, and guidesL, fixed to itssides,

serve to keep it in place when it travels in the strap. Y

The bar or roller H has longitudinal notches or teeth cut on itssurface, and a concave depression in the inner plate E has correspond4ing teeth. A projection, forming shoulders .o p, extends across theplate at right angles on the inside of one of the plates D or E, at apoint one side of their middle, so that when the chisels are insertedthey will each bear against this projection, one on either side.

When the chisels are inserted between. the plates, the set-screw K inthe strap G is turned, bringing the two plates D and E toi gether, andpinching them upon the chisels. The strip J, on which the screw presseswhen being turned, acts as a toggle-lever, and transmits the pressure toits ends, which are thus forced against the ends of the plate D,pressing it upon the chisels, and holding them more firmly in place.This bent strip J also serves as a brace, and strengthens the holdermaterially.

The handle B is Xed in the roller H, and

before the two plates are clamped upon the chisels the roller can beturned to bring thehandle at any desired angle with the chisels. As theplates are clamped together the cylinder is forced into the depressionin the plate D, and the teeth on the surface of the rollerinterlockvwith those in the depression, so that when the chisels arefirmly secured in the head A the handle is also rigidly lixed at thedesired angle with the chisels.

The shoulders o p, against which the inner ends ofthe chisels bear,being set at one side of the middle of the holder, allow of chisels ofdifferent length being used, so that when a chisel is worn short bycontinued use it can be placed in the shorter division of the holder,and still project from the holder a suitable length, and answer the samepurpose as a chisel of full length.-

Having described my invention, I claim and desire to secure by LettersPatent-- l. A mill-pic`k provided'with shoulders o p,

for holding chisels of unequal length, and a handle attached to thisholder, which can be placed at any desired angle with the chisels,substantially as and for the purposes herein described.

2. The parallel plates D and E, with their E,l and operated for clampingthe plates D and sides F and shoulders o and p, the plates held E, andfor securing the handle B at any angle together and operated to clampupon the chiswith the chisels, substantially as and for the els by astrap, G, roller H, strip `or brace J, purposes herein described. andset-screw K, in combination With the han- In Witness whereof I havehereunto set my dle B, and all combined,d operated, and arhand and seal.ranged substantiall as an for the pu ose herein describe@ y TP WILLIAMB. MoRRIs. [1.. s]

3. The roller H, connecting the ends of the Witnesses; strap G,'having atoothed surface fitting into F. A. BROOKS, a corresponding toothdepression in the plate HENRY J. DODD.

